CN1995856A - Plastic water heater lining and method for manufacturing same - Google Patents

Plastic water heater lining and method for manufacturing same Download PDF

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Publication number
CN1995856A
CN1995856A CN 200610166564 CN200610166564A CN1995856A CN 1995856 A CN1995856 A CN 1995856A CN 200610166564 CN200610166564 CN 200610166564 CN 200610166564 A CN200610166564 A CN 200610166564A CN 1995856 A CN1995856 A CN 1995856A
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China
Prior art keywords
water heater
inner bag
plastic water
liner
manufacturing
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Pending
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CN 200610166564
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Chinese (zh)
Inventor
刘黎
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Wuhan University WHU
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Wuhan University WHU
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Priority to CN 200610166564 priority Critical patent/CN1995856A/en
Publication of CN1995856A publication Critical patent/CN1995856A/en
Pending legal-status Critical Current

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Abstract

The invention relates to an internal bladder of plastic heater and the manufacturing method, characterized in that the internal bladder is made of triple-types random copolymerization polypropylene and is produced by rotational forming process. It is provided with simple producing process, good insulation performance, high safe performance, low manufacturing and maintaining cost, more environmental protection and energy saving, light weight, high intensity, beautiful-looking and wear resistance.

Description

Plastic water heater lining and manufacture method thereof
Technical field
A kind of inner bag, especially water heater liner.
Background technology
Ceramic liner is through refractory oxide and carbide, with a kind of utensil inner bag of ceramic powders barbecue on sheet metal.It for many years, obtains the extensive and long-term use of manufacturing enterprise with its low production cost, is a kind of comparatively traditional utensil inner bag.Yet, dystectic barbecue processing technology, the energy consumption of production is bigger, and energy mode is electricity consumption and burns coal.Weak point:
1, generally about 1200 ℃, the process-cycle is about 10~20 hours to the processing temperature of ceramic liner.In electricity consumption, process, a large amount of energy have been consumed, especially special contaminated environment with coal the time with coal.
2, the ceramic liner of splendid attire running water owing to be subjected to high temperature action for a long time, is easy to generate dirt, and inner bag water quality is caused secondary pollution, and prolong consumed power heat time heating time.
3, ceramic liner is to be made by ceramic powders and sheet metal, and heat insulating ability is poor, causes prolong consumed power heat time heating time.
4, the raw-material processing of sheet metal is comparatively complicated, as: cut, dash, ten multiple tracks production processes such as volume, weldering and pickling.
5, the rigidity of ceramic liner weak (fragility) by long high temperature, high pressure, is broken and is got rusty easily.Cause the appearance of the situation of leaking, general being difficult for repairs, and almost becomes the state of scrapping.
The material of stainless steel inner container is harder, and service life is longer, and relatively health is difficult for getting rusty.If occur leaking and to weld.Weak point:
1, the manufacture of materials cost is higher.
2, in the manufacturing process of inner bag same exist cut, dash, production processes such as volume, weldering.
3, under the high temperature action, be easy to generate dirt, cause prolong heat time heating time, consumed power forms secondary pollution to inner bag water quality.Though the built-in anodic magnesium rod apparatus for eliminating sludge of some electric heaters, anodic magnesium rod needed change once in 2 years, maintained cumbersome.
The development on the basis of in the past ceramic liner and stainless steel inner container of existing plastic water heater lining technology, at the bottom of having solved the above two complex manufacturing, shaping efficiency to a certain extent, the defective of heat-insulating property difference, but deficiency is separately arranged all, through patent retrieval, it is as follows that the present situation of existing plastics (compound) water heater liner technology and background thereof are carried out the analysis situation:
Application (patent) number: 02115210.1.This patent is a kind of internal plastic container of electric water heater, it is made up of at least two plastic shaping housing butt joints, be distributed with the connecting plate and the joint pin of some moulding in shell inner surface, all connecting plates on the housing that connects and joint pin are corresponding one by one and interconnect, just in time can increase the internal pressure strength of housing, guarantee that inner bag is unlikely stressed excessive and be out of shape.Housing butt joint can constitute an inner bag that cavity is arranged, and it use plastic shaping, have therefore that processing is more or less freely, production cost is lower, shaping efficiency is higher, anticorrosion and heat insulation capacity by force, can form the characteristics of some shapes arbitrarily.But its shell inner surface has been distributed with the connecting plate and the joint pin of several moulding of resistance to compression effect, causes the compression-resistant structure member too much, complex manufacturing, and manufacturing cost is too high.
Application (patent) number: 02123978.9.The inner bag of the described water heater of this patent is made of plastics, because plastics are extremely corrosion-resistant, this structure does not directly adopt metal material again, thereby this structure can be stopped the corrosion leakage phenomenon of water heater liner, prolongs the service life of water heater.Owing to adopted roll moulding shaping technology, make that water heater liner can global formation, there is not any weld seam, the drainage that this weld defect that has overcome water heater liner again causes.But the kind and concrete composition structure of described plastics are not described by this patent, cause it having certain limitation and deficiency aspect the security performances such as shock resistance, withstand voltage properties.
Application (patent) number: 02117235.8.This patent is to adopt a kind of manufacture method of composite structure water heater liner, and this composite construction is metal+adhesive+plastics.Though it is obtaining raising to a certain degree aspect decay resistance and service life, but at the bottom of this project construction complex process, the shaping efficiency, production cycle is long, and the manufacturing cost height, especially it has consumed a large amount of electricity, coal equal energy source resource in making production process, has polluted environment.
Domestic and international in recent years many scholars have done number of research projects to polypropylene material, the Ceng Youguan report utilizes hot analysis means research crystallization behavior, rheological characteristic, can utilize the method for infrared spectrum analysis to differentiate the PP-R material, the structure of the second third copolymerization strand and the crystalline condition of polymer-extruded forming process have substantial connection in the PP-R material, on polypropylene chains, introduce ethene, purpose is in order to change the regular state of main chain, cause the polymer crystallization defective, and then influence the arrangement of copolymer crystallization folded chain, crystal form changes, degree of crystallinity, crystalline rate and fusing point reduce, and directly influence the shock resistance of tubing, the performance of aspects such as long-term resistance to hydrostatic pressure.
Atactic copolymerized polypropene (PP-R) is as third generation polypropylene material, by the heating of propylene monomer and a spot of vinyl monomer, pressurization and under the Ziegler-Natta catalyst effect copolymerization obtain, vinyl monomer is distributed in the long-chain of propylene at random, equably, reduce crystallinity of polymer and fusing point, and improved shock resistance, the withstand voltage properties of material.
Summary of the invention
The purpose of this invention is to provide a kind of plastic water heater lining and manufacture method thereof, overcome the shortcoming and defect of existing plastics inner bag in the above-mentioned background technology, and manufacturing is simple, heat-insulating property is outstanding, security performance is high, the maintenance expense is low, manufacturing cost is low, more environmental protection and energy saving, intensity height in light weight.
The technical solution adopted for the present invention to solve the technical problems is: a kind of plastic water heater lining is characterized in that: the material of inner bag is three type atactic copolymerized polypropenes.
The manufacture method of aforesaid plastic water heater lining is characterized in that: manufacture water heater liner with three type atactic copolymerized polypropenes by roll moulding shaping technology.
Beneficial effect: manufacturing is simple, heat-insulating property is outstanding, security performance is high, the maintenance expense is low, manufacturing cost is low, more environmental protection and energy saving, and intensity height in light weight is attractive in appearance wear-resisting.
The specific embodiment
A kind of plastic water heater lining, adopt roll moulding shaping technology with three type atactic copolymerized polypropenes, make that water heater liner can global formation, do not have any weld seam, the drainage that this weld defect that has not only overcome water heater liner causes has also improved production efficiency of products and qualification rate greatly.
This three type atactic copolymerized polypropene water heater liner production and processings are simple, need not through cutting, dash, the production process of complexity such as volume, welding and pickling.And characteristic (circle, ellipse, rectangle etc.) with moulding sampleization.
Three type atactic copolymerized polypropene (PolyProperlene-Ramdom) material heat-insulating properties are better.Through measuring, it is that thermal conductivity factor is about 0.21W/mh ℃, is 1/200 of metal material, and is very energy-conservation.
Three type atactic copolymerized polypropene materials have certain elasticity, and thermal coefficient of expansion is 0.16/mm (m a ℃) -1Make the liner material cross section to expand outside the tank under the situation that temperature is lower with the liquid of frost heave, thus absorb frost heave liquid volume and can spalling.
In light weight, intensity is high.The intensity proportion of three type atactic copolymerized polypropene materials only is 1/8 of common stainless steel material, and the compression resistance proof strength reaches 5MPa (50kg/cm 2) more than, it by the heating of propylene monomer and a spot of vinyl monomer, pressurization and under the Ziegler-Natta catalyst effect copolymerization obtain, vinyl monomer is distributed in the long-chain of propylene at random, equably, reduce crystallinity of polymer and fusing point, and improved shock resistance, the withstand voltage properties of material.Need not increase any compression member.Compare with existing plastic water heater lining technology, its good toughness, shock-resistant, the security performance height.
Wear-resistant, non-scaling, material is light, corrosion-resistant, long service life, and internal and external walls is uniform and smooth, and flow resistance is little, and color is soft, and is handsome in appearance.The intake-outlet place fouling that can exempt in the inner bag is stopped up.Can not cause secondary pollution to the water quality in the inner bag, reach the effect of energy-saving heat preserving.
Nontoxic, safety, health.The PP-R raw material belongs to polyolefin, and carbon, protium, nontoxic, health are only arranged in its molecule.Its fusing point is 110 ℃, satisfies national standard, and inner bag high-temperature resistance in heating process is strong, and performance is safe and reliable.
Long service life.This material adopts advanced gas-phase process, ethene and propylene in strand randomly, polymerization is called PP-R (III type) equably.PP-R has better shock resistance than other traditional materials, and its strength retrogression is slower under temperature and interior pressure long term, i.e. longer service life under the condition of identical temperature and interior pressure.Regular service conditions can reach more than 50 years following service life, is comparatively desirable water heater liner material.
Energy-saving and environmental protection.Do not need in the production process to consume a large amount of energy, pollution-free.And can regeneration.The overall process of processing, using and discard at raw material production, goods all can not cause adverse effect to human body and environment, is called as green material.
Market prospects are good.From the angle of enterprise operation and management, adopt three type atactic copolymerized polypropene material water heater liners, when reducing production cost, also can reduce costs such as management cost, circulation cost, human resources.
The three type atactic copolymerized polypropene materials and the other materials water heater liner performance evaluation table of comparisons
Performance Liner material
Three type atactic copolymerized polypropene material inner bags The stainless steel material inner bag The ceramic material inner bag General plastic material inner bag The composite inner bag
Hear resistance Good Good Good Relatively poor Better
Wall thickness (reaching identical requirement) Generally Thinner Thicker The thickest Thicker
Sanitation performance Excellent Very Very Very Very
Environmental-protecting performance Excellent In Difference Very In
Production technology and equipment The simplest Complicated Complicated Simpler The most complicated
The property recycled Energy Energy Can not Can not Can not
Thermal conductivity factor (W/mh ℃) 0.21 43 19 1.19 -
Compressive resistance Better Good Generally Difference Generally
Thermal coefficient of expansion Better Good Better Difference Generally
Antiseptic property Excellent Very Very Generally Very
Density Less Greatly Greatly Less -
Long-term heat-resisting withstand voltage again service life Long Generally Generally Short Longer

Claims (2)

1, a kind of plastic water heater lining is characterized in that: the material of inner bag is three type atactic copolymerized polypropenes.
2, the manufacture method of plastic water heater lining as claimed in claim 1 is characterized in that: manufacture water heater liner with three type atactic copolymerized polypropenes by roll moulding shaping technology.
CN 200610166564 2006-12-30 2006-12-30 Plastic water heater lining and method for manufacturing same Pending CN1995856A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200610166564 CN1995856A (en) 2006-12-30 2006-12-30 Plastic water heater lining and method for manufacturing same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200610166564 CN1995856A (en) 2006-12-30 2006-12-30 Plastic water heater lining and method for manufacturing same

Publications (1)

Publication Number Publication Date
CN1995856A true CN1995856A (en) 2007-07-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200610166564 Pending CN1995856A (en) 2006-12-30 2006-12-30 Plastic water heater lining and method for manufacturing same

Country Status (1)

Country Link
CN (1) CN1995856A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101735512B (en) * 2009-12-28 2013-04-17 上海金发科技发展有限公司 Beta-crystalline homopolymerization polypropylene composition for inner chamber of water heater and preparation method thereof
CN103604228A (en) * 2013-11-15 2014-02-26 尉氏县永胜塑料制品有限公司 Plastic inner container and method for manufacturing same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101735512B (en) * 2009-12-28 2013-04-17 上海金发科技发展有限公司 Beta-crystalline homopolymerization polypropylene composition for inner chamber of water heater and preparation method thereof
CN103604228A (en) * 2013-11-15 2014-02-26 尉氏县永胜塑料制品有限公司 Plastic inner container and method for manufacturing same
CN103604228B (en) * 2013-11-15 2017-01-04 尉氏县永胜塑料制品有限公司 A kind of plastic inner container and preparation method thereof

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